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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $8,359,335 | $17,891,961 | $19,721,858 | $19,065,639 | $11,073,988 | $4,876,030 | $9,683,251 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $11,155,596 | $13,258,816 | $10,383,825 | $6,003,384 | $594,564 | $1,018,708 | $398,911 |
| Total | $19,514,931 | $31,150,777 | $30,105,683 | $25,069,023 | $11,668,552 | $5,894,738 | $10,082,162 |
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